Fuel injection device



y 5, 1964 w. L. KENNEDY, SR 3,132,191

FUEL INJECTION DEVICE Filed March 9, 1962 3 Sheets-Sheet l v INVENTOR. I/8 14 44 752 1.. KEN/V50), Se.

#76. V 3. BY

May 5, 1964 Filed March 9, 1962 FIG. 5-

W. L. KENNEDY, SR

FUEL INJECTION DEVICE 3 Sheets-Sheet 2 INVEN TOR. WALTEE 4. eewwsax 62.

47-roe/wsys.

y 5, 1954 w. L. KENNEDY, SR 3,132,191

FUEL INJECTION DEVICE Filed March 9, 1962 3 Sheets-Sheet 3 V "17,, i l":

/ FIG. 2a.

9! j TNEQTTLE- 39 :9 17 :9 //0 no 98 +VACUUM INVENTOR. W44 752LKZ/V/m'w; 54?.

izmw 125mm injection device of FIGURES 1, 2

United States Patent f 3,132,191 FUEL INJECTIGN DEVICE vWalter L.Kennedy, S12, Berkley, Mich.

(6039 Rolton Court, Waterford, Mich.)

Filed Mar. 9, 1962, Ser. No. 178,682 8 Claims. (61. 2611-41) Thisinvention relates to a fuel injector for internal combustion engines,and more particularly to an improved fuel metering device adapted to beemployed in place of a conventional carburetor in an internal combustionengine;

Amain object of the invention is to provide a novel" craft, and thelike.

A further object of the invention is to provide an improved fuelinjection device for internal combustion engines, the device beingcomposed of relatively inexpen- -sive parts, being easy to install,being reliable in operation, and providing improved performance and fueleconomy.

A still further object of the invention is to provide an improved fuelinjection device for internal combustion engines, the device beingrelatively compact in size, being durable in constructiombeing'easy toadjust, being substantially leak-proof, and being arranged so thattransmission of fuel therethrough is automatically shut olf responsiveto the stopping of the associated engine A still further object of theinvention is to provide an improved fuel injection device for aninternal combustion engine wherein the rotating parts are self-aligning,wherein substantial sealing areas'are provided for parts intended to bein sealing contact with each other, which is arranged to allow preciseprimary metering of the fuel,

which employs parts requiring a minimum amount of internal drilling, sothat the parts are not materially weakened and are inexpensive, tofabricate, and which is provided with easily accessible means foradjusting the fuel richness, the idle position of the main butterflyvalve, and the degree 0f spring-tension exerted between cooperatingthrottle-actuating arms of the fuel injection device.

. A still further object of the invention is to provide an improvedfuelinjection device for an internal combustion engine, said device beingprovided with means to prevent transmission of fuel therethrough unlessthe associated engine is developing vacuum, whereby the supply of fuelto the engine is automatically shut off when the engine is not runningor stalled for any reason.

Further objects and advantages of the invention will become apparentfrom the following description and claims, and from the accompanyingdrawings, wherein:

FIGUREI is a perspective view of an improved fuel injection deviceconstructed in accordance with the present invention, shown in normaloperating position. FIGURE 2 is an enlarged side elevational view takenfrom the left-hand side of the fuel injection device of FIGURE 1.

' FIGURE '3 is an enlarged rear end elevational view of the fuelinjection device of FIGURE 1. I

FIGURE 4 is a fragmentary bottom view of the fuel terfly valve thereofin full-throttle position.

. A FIGURE 5 is a vertical cross sectional view taken substantially. onthe line 55 of FIGURE 2.

FIGURE 6 is a vertical cross sectional view taken substantially on theline 6-6 of FIGURE 2. j

3,132,191 Patented May 5, 1964 FIGURE 7 is a vertical cross sectionalview taken substantially on the line 7-7 of FIGURE 5.

FIGURE 8 is a perspective view of the metering shaft employed in thefuel injection device of FIGURES 1 to 7 with the parts thereof shown inseparated positions.

'FIGURE 9 is a perspective view of the butterfly valve shaft employed inthe fuel injection device of FIGURES 1 to 7. j

FIGURE 10 is a perspective view of the butterfly valve elementemployedin the fuel injection device of FIG- URES l to 7.

FIGURE 11 is a diagrammatic view showing the relationship between theprimary metering slot on the butterfly valve shaft member and theprimary metering jet cav- 'ty on the conical seat of the metering shaftin the off position of the fuel injection device, wherein there is nocommunication between the fuel supply jet cavity and the primarymetering slot.

FIGURE 12 is a diagrammatic view showing the relationship between theprimary metering slot in the butterfly shaft and the primary meteringjet cavity in the fuel metering shaft in the idle running position ofthe fuel injection device.

FIGURE 13 is a diagrammatic view similar to FIG- URES 11 and 12 butshowing the relationship of the primary metering slot in the butterflyshaft and the primary metering jet cavity in the fuel metering shaft inthe full-throttle position of the fuel injection device.

FIGURE 14 is a perspective view showing the fixed throttle arm and thefloating throttle arm cooperating therewith to rotate the butterflyshaft, as employed in the fuel injection device of FIGURESl to 13, theparts being shown in separated positions. i v

. FIGURE 15 is a fragmentary side elevational view of a portion of amodified form of fuel injection deviceaccording to the presentinvention, showing an interlocked bracket and interlock cam cooperatingtherewith, as employed in an installation where a remote-mounted vacuumcylinder is utilizedas a fuel cut-off control element, or in aninstallation employing multiple fuel injection devices. g r

FIGURE 16 is a perspective view of the interlock bracket elementemployed in the arrangement illustrated in FIGURE 15.

FIGURE 17 is a side elevational view of a modified form of meteringshaft which maybe employed in a fuel injection device according to thepresent invention.

FIGURE 18 is an enlarged end elevational view of the modified meteringshaft illustrated in FIGURE 17 and including the internal springemployed therewith.

FIGURE 19 is an enlarged cross sectional View taken substantially on theline 19-19 of FIGURE 18.

and 3, showing the but- FIGURE 20 is a diagrammatic view showingamultiple arrangement of three fuel injectors operated by a commoncontrol rod and provided with a common vacuumresponsive fuel cut-offcontrol chamber, employing interlocked bracket assemblies as illustratedin FIGURES l5 and 16. 1

Referring to the drawings, and more particularly to FIGURES 1 to 14, themain body of an improved fuel injection device according to the presentinvention is designated by the reference numeral 1, and the butterflyvalve thereof is designated by the reference numeral 2; The butterflyvalve 2 is mounted on a butterfly shaft 3 which is rotatably supportedat one end portion thereof in an enlarged boss 48 formed in the injectorbody 1, the shaft 3 being formed at its opposite end with an enlargedannular head portion 54 which is rotatably supported in the laterallyprojecting cylindrical housing 'the enlarged head 54 is convergingtoward the bore of the shaft 3 and formed 7 with a generally triangularprimary metering slot or recess 42 adjacent thefvertex portion of theseat 53.

The tubular shaft 3 is formed with a longitudinal slot 56 whichcormnunicates with a plurality of longitudinally aligned apertures 44formed in the sleeve portion of the butterfly valve 2 and leading, intothe low pressure atomization space 57 defined inside a canopy flange 58provided on the butterfly valve 2, as is clearly shown in FIGURE 7.

Disposed axially in the cylindrical housing 55 is a metering shaft 4which is formed with an enlarged head portion 59 having a conical face52 which is rotatably and sealingly engageable against the conical seat53, the shaft 4 being formed with an internal fuel passage 51 whichconnects a fuel-receiving cavity 60 atthe outer end of the shaft with aprimary metering recess or cavity 41 formed in the conical face 52 andbeing registrable with the metering groove or slot 42 of member 54.

' As shown in FIGURE 8, the recess 41 flares in width in thecircumferential direction of face 52, being relatively smallin width atone end and being of relatively 5 slidably fits inside an opening 69formed in the member 63 and is biased outwardly by a pair of coilsprings 6, 6 engaging in recesses '70, 70 formed in the block andbearing against the inside of the hollow member as,

whereby the block 5 is biased outwardly into sealing contact with theinside surface of the hollow shaft 3. As shown, the member 68 is locatedso that a fuel orifice 43 provided in the block 5 is registrable withthe slot 56. However, the outside of the orifice 43 is triangular inshape so that the degree of registration between the orifice 43 and thelongitudinal slot 56 depends" upon the rotated position of shaft 4withrespect to the butterfly shaft 3.

Thus, the slot 56 and-the orifice 43 cooperate to provideasupplernentary metering action generally similar to that provided bythe coasting metering recesses 41 and 42. Orifice 43 is closed duringidling.

Sealingly' secured by friction inside the end portion of the shaft 3opposite the housing member 55 is a sleeve member 9 in which isthreadedly engaged the idle adlarge width at its opposite end, but beingarcuately curved so that it will be transversely overlapped by thegroove 42 over the working range of rotation of the butterfly valve 2.As shown in FIGURE 11, and as will be presently explained, the primarymetering recess 42 does not overlap the metering recess 41 in the normalnonoperating condition of the fuel injection device, preventing fuelfrom reaching the interior of the tubular butterfly shaft 3.

A fuel inlet fitting 18 isconnected to the end of the metering shaft 4,being threadedly engaged into the recess 60 and being in communicationtherewith. A suitable flexible conduit, not shown, connects the fitting18 to the fuel pump associated with the engine with which the injectiondevice is employed, the fuel pressure line between the fuel pump and theinjection device being preferably provided with a fuel pressureregulator to maintain a substantially constant fuel supply pressure.

As above mentioned, the conduit connected to the fitting 18 should besufiiciently flexible to allow the shaft 4 to be rotated to the fuel-oilposition of FIGURE 11 in a manner presently to be described.

A11 annular retaining cap 15 is screw/threaded on the end of thecylindrical housing 55, and a coiled spring 1 4 is provided inside thecylindrical housing 55, the coiled spring 14 bearing between the annularcap member 15 and the end flange61 of a spring retaining sleeve 13surrounding the metering shaft 4; As shown in FIGURE 5, ball bearings 12may be provided between the flange 61 and the enlarged head portion 59of the metering shaft 4 to facilitate free rotation of the meteringshaft 4 with respect to the spring retaining sleeve 13. 1 Spring 14holds conical surface 52 in sealing contact with conicalsurface 53,preventing leakage of fuel therebetween.

Diametri'cally opposed radially extending arms and 31' are secured inand project from the periphery of the justing needle shaft 10. Asuitable O ring of neoprene or other similar deformable resilientmateriai, shown at 11 is provided at the inner'end portion of the sleeve9, further sealing the sleeve with respect to the inside surface of thehollow shaft 3. The needle valve member 10 has the tapered endportion70which may be adjusted with respect to a needle valve seat 71 formed inthe inner end portion of the sleeve member 9, to regulate the rate offlow of liquid fuel into the sleeve memher 9 from the forward portion ofthe butterfly shaft 3, the sleeve 9 and the shaft 3v being apertured at46 in communication with theidle fuel aperture 45 of buti A sealing cap'72 is threadedly secured on the outer end of the sleeve member 9, asuitable annular packing ring 16 being provided around the shaft of theneedle 10 within the cap 72 to seal the member 19 with respect to themember 9. As will be readily apparent, the needle 10 may be adjusted bymeans of a slotted external head 73' to provide a desired idle fuel flowadjustment. I

Designated at19 is a throttle lever which is rotatably mounted on'thebutterfly shaft 3 adjacent the boss 43, thelever being formed withafirst arm '73 and the respect-iveiaterally extending second and thirdarms 75 and 74 respectively. The top end of the upstanding arm 7 3 isapertured 'at 76 for connection to a conventional i biased to theright,as viewed in FIGURE 2, by suitable enlarged head portion 59, said armsextendingthrough I respective peripheral slots 63 and 64 provided in thehousing 55. A coiled spring 32 is mounted on a lug 65 formed on theinjector body 1, the top end of the spring 32 bearing against the arm 31and biasing the-metering shaft 4' in a counterclockwise direction, asviewed in FIGURE 3, toward engagement with the bottom end of anadjustable stop screw 33 threadedly engaged through a fixed lug 66 onbody 1. A retaining spring 34 surrounds the shank portion of the screw33, hearing between the head thereof and the lug 66. The screw 33 isemployed to provide a coarse adjustment of the richness of the fuelmixture under idling conditions. r

x As shown in FIGURE 8,'the metering shaft 4 is formed with a reducedportion 67 and with the hollow end portion 68 which sealingly and'rotatably fits inside the bore of the butterfly shaft 3. Asemicylindrical block spring means, not shown, and of a conventionaltype, the rod 49 being moved'to the left, as viewed in FIG- URE 2,responsive to the depression of the associated accelerator pedal.

Designated at 20 is a throttle arm assembly which is clampingly securedon the butterfly shaft 3 adjacent to theifloating lever member 19, themember 20 being generally U-shaped in cross section, as shown in FIGURE14, and being suitablycut away to fit around the member *19 and toreceive' the bearing sleeve portion 77' thereof between the ringportions 78, 78 of the member 20, the ring 'portion' 78 'clampinglyengaging the butterfly shaft. 1 As shown in FIGURE 14, the ring-likeelements 78, 78 are integrally formed onthe respective side arms of themember 20, being connected by the transversely extending big ht portion7?. The opposite arm, namely, the arm associated with the ring-lil eelement 78 is lon g itudinally slotted at 30 to define upper and lowerfingersfi l an-d 8-2, the upper finger 81 merging with a transverselyextending arm 83 having atapped opening 84 therein, and the lower finger82 merging with a transversely extending wall'having a central apertureadapted to receive a clamping screw 21 which is threadedly enthebuttenfly shaft 3. The arm 83 and the opposing wall associated with thelower finger 32 are integral with the top and bottom edges of. the arm87 extending from the ring-like member 78', whereby the arm 87 isintegrally related with the fingers 81 and 82.

The arm 87 is formed with an outwardly projecting lug 88 which isprovided with a tapped opening 89 to receive an adjustable stop screw25, said stop screw being engageable with a stop lug 48 on the body 1 toestablish the idling position ,of'the butterfly valve 2. A coiled spring47' surrounds the screw 25, hearing between lug 88 and the head of screw25 and serving as a means to hold the screw 25 in its adjusted position.

The arm 75 of lever 19 is formed at its end portion with an internallythreaded sleeve 90, said sleeve being located so that its axis isdirected toward thebight Q portion 79 of the U-shaped end of lever 26Dwhen the pants 19 and 20 are nestingly interengaged in assembledrelationship on the shaft 3, the throttle arm tension adjusting screw 23being threaded through the sleeve 90 and being locked in adjustedposition therein by a lock nut 24. A coiled spring 22 is mounted betweenthe end of screw 23 and the bight member 79, as illustrated in FIGURE 2,the end of screw 23 and the bight member 79 being provided with opposingprojections 92 and 9'3 engaging in the opposite ends of the, spring 22to hold the spring in centered position between screw 23 and member 79.Thus, the spring tnansmits force from the arm 7 to the bight member 79when the rod 49 moved to the right, namely, toward its release position,the force acting on member 79 being transmitted to the arm 73'. When theaccelerator rod 49 is moved to the left, as viewed in FlGURE 2, forceis, transmitted directly from; the arm 73 to the bight member 79, sothat the butterfly shaft 3 is rotated in a positive manner responsive tothe movement of rod 49 to the left.

The arm 74 is formed with the upstanding end portion 94 which terminatesin the horizontally extending and lug 95. The lug 95 overlies the end ofa lever 26 WlJiChlS pivoted to the body 1 at 97. The opposite end of thelever 26 is formed with an inwardly directed lug 97 which is connectedby a depending link rod '29 to the end of the outwardly projecting arm30 associated with member 59 of metering shaft 4.

roller 27 which overlies a cam bar 36 slidably mounted in achanneledbracket secured on the base flange of body 1. The cam bar 36 isconnected to the diaphragm of avacuum-responsive diaphragmchamjber 37,the working space of said chamber being connectedby a conduit 98 tointernal combustion engine, whereby vacuum developed by the enginecauses the diaphragm of chamber 37 to flex in a manner to move bar 36 tothe right, namely, to the position thereof shown in FIGUREZ. When novacuum is present, the diaphragm of chamber 37 relaxes so that the bar36 is moved to the left from the position thereof shown in FIGURE, 2.

cam projection 99 which is engageable beneath the roller 27 in themanner illustrated in FIGURE 2 responsive to vacuum produced by theinternal combustion engine,

counterclockwise, as viewedin FIGURE 2, from its normal position andthrough link 29' and projection 30 to control the position of meteringshaft 4. In this position the arm 73 engages bight member 79 of lever78- and holds the butterflly shaft 3 in its idling position. I Thisposition is illustrated in FIGURE 12, wherein it is seen that shaft 4 iscooperatively positioned relative to shaft 3 such that the small end ofthe recess 42 overlaps the small end of the recess 41 and a sufficientamount-of fuel will be delivered by the injection device to allow theengine to idle. When there is no vacuum, the bar 36 shifts to the leftfrom the position thereof shown in FIG- Journaled onthe lever 26adjacent the lug'95 is a the intake manifold of the associated The baras is formed at its end with the upstanding tohold the lever 19 in aposition somewhat rotated 6 URE 2, allowing lever 19 to rotate clockwiseand causing face 52 to rotate clockwise from the position of FIGURE 12by the action of link 29 and projection 301as the roller 27 engages thedepressed portion of the top edge of bar 36g This is the positionillustrated in FIGURE 11.

The arm 74 is formed with an opening Stl at its corner portion toprovide a means for connecting the arm 74 to a vertically operatingaccelerator rod instead of to the horizontally operating accelerator rod49 shown in dotted view in FIGURE 2. v t

As shown in FIGURE 13, during normal operation of the vehicle, theaccelerator rod 49 may be moved to the left sufliciently to cause lever19 to rotate butterfly shaft 3 to a position wherein the recess 42overlaps the widest portion of the recess 41, and wherein the widestportion of the opening 4-3 is exposed to the butterfly fuel jetorifices44. This provides maximum flow of fuel through the injection device. I

It will be understood that when the ignition system is deenergized,causing the engine to stop, or if the engine stalls, there is no longerany vacuum produced by the engine and the diaphragm of chamber 37relaxes to cause 0am bar 36 to move to the left from the positionthereof shown, in FIGURE 2, which allows the face 52 to be, rotated bylever 26 and link 29 to the cut-0E position thereof illustrated inFIGURE 11, terminating the supply of fuel. However, under idlingconditions, namely, when the engine is running, although not under load,sufficient vacuum is produced to hold cam portion 99 beneath roller 27and to control the position of shaft 4 to prevent thereleasedaccelerator rod 49 from rotating lever 19 clockwise to a position whichprovides cut-01f of fuel.

As will be seen from FIGURES 9 and 10 ,the butterfly valve 2 is made ofa separate casting, being subsequently secured on the butterfly shaft 3to provide the rigid u-nitary combination of these two elementsillustrated in FIG- GURE 5. Thus, in the fabrication of the injectionunit,;

only two castings are required, namely, the main body -1 and thebutterfly valve body 2. In the assembly, of the injection device, thebutterfly valve 2 is inserted through the bore of the body 1 and thebutterfly shaft 3 is inserted perpendicularly thereto through thehousing '55 so as to engage in the bore portion 101 of the butterflyvalve body 2. Preferably, the engagement between the shaft *3 and thebutterfly valve bore 100 is sufficiently tight so that said elements 2and 3 will be rigidly united with the butterfly valve 2 abutting theenlarged portion 54 of shaft 3-. In operation, the operator starts themotor by turning on the starting switch, resulting in the diaphragm ofthe chamber 37 to flex in a manner to move the bar 36 to the right, theposition shown in FIGURE 2. The movement of bar 36 to the position shownin FIGURE 2, rocks the lever 26 so as to be depressed toward theprojecting arm 30, resulting in movement of the metering recess 4 1intoregistry with me metering recess 42, permitting, fuel to flo-w fromthe internal fuel passage 51 into and through the registering recesses41 and 42, into the hollow shaft means or shaft 3, into the reducedportion 67, into the clearance passage 101 provided between the reducedportion 67 and the sealing portion 68 ofmember 4, into the central bore102, into the inner end of the idler shaft 9, past the needle valve tip70, through the registeringapertures 45;and 46 into the space 57provided by the butterfly valve 2, and into the manifold.

. Upon accelerating the speed of the motor by applyingincreasingpressure to the accelerator rod 49, the throttle lever 20 isrotated correspondingly, resulting in the meter,- ing recess 42 to beadvanced alongthe metering recess 41 and consequently increasing theflow of fuel therethrough, and simultaneously therewith bringing themetering orifice 43 into registry with the slot 56 and the spacedapertures 44 communicating therewith.

-As above described, under idling conditions the recess 41 registerswith the recess 42 in the rnanner illustrated'in FIGURE 12, providing asupply of fuel at a. rate determined by the setting of thejrnain fuelrichness adjusting screw 33, since the spring 32 urges the arm -31 into,abutmentwith the end of said screw 33. The idling rate is also subjectto the fine adjustment provided by the needle member 10, which controlsthe rate at which liquid fuel flows through the bore 1112 to theregistering apertures 45 and 46. The idling position of the butterflyvalve is con ground to any desired angle, in accordance with the amountof sealing area required. In a typical embodiment of the invention, anangle of 30 was employed for the side slope of the generating cone. Theconical surfaces are preferably ground and hardened to provide highresistance to wear, thus minimizing leakage between the surfaces.

FIGURES 17, 18 and 19 illustrate an alternative struc ture Which may beemployed to provide sealing engagement between the'metering shaft andthe hollow butterfly shaft 3 Thus, in FIGURES 17, 18 and 19-, themetering shaft is-designated at 4 and is provided with the enlargedmember 59-having the conical sealing surface 52, as in the previouslydescribed form of the invention. The

.sealing surface 52 is provided with the same tapered recess 41 employedin the previously described form of the invention and has the reducedshank portion 67' and the enlarged generally cylindrical end portion 68'which is longitudinally slotted, by the provision of a median slot 104-which extends through'the major portion or the length of the reducedportion 67', whereby two relatively flexible, generally semi-cylindricalsegments 5 and 195 are provided. The member 68 is formed with a taperedinternally threaded bore 107 in which is threaded a correspondinglytapered coil spring 8, the triangular cross sectional shape of the coilspring 8 being clearly shown in FIGURE 18. The spring h acts in a mannersimilar to the previously described springs'6, 6 to exert an outwardspreading force on the sealing member 68' to bias the exterior surfacesof the member 6% into sealing contact with the inside surfaces of thehollow butterfly shaft 3. As shown in FIGURE 17, the lower segment 1135'is provided with the generally triangular fuel discharge aperture 43which cooperates with the jet orifices 44 of the butterfly valve in thesame manner as in the previously described form of the invention.

. FIGURES and 16 illustrate an alternative form of support for thesliding cam bar employed to control the positionof the shut-offlever 2 6by engagement with the roller 27 carried on said shut-off lever. Thisarrangement may be employed where the control element, for example, thevacuum-responsive operating means for the cam bar is located at a remoteposition with: respect to the fuel injection device. Thus, a flexiblecable 11d may be employed to connect the diaphragm of thevacuumresponsive device to the cam bar. In the arrangement of FIGURES 15and 16 a supporting bracket 38 is secured to the base flange of thebody1, said bracket being integrally formed with achannel portion 111. Thechannel member 111 is integrally formed at one end a tubular guidesleeve portion 1112 and is further formed at an intermediate portionthereof with a generally rectangular archlike retaining lug 113 whichconnects the top edges of the opposite side walls of the channel member111. Slidably disposed in the channel member 111 is the cam bar 39formed with the elevated end cam portion 99" Which is adapted tocooperate with the roller 27 in the same manner as the elevated camportion 99 ofthe previously described form of the invention. The cam bar39 is provided at its forward end with an apertured attachment lug 114adapted to be clampingly secured to the end of' the flexible cable 110';by conventional connecting member 1 15, as shown in FIGURE 15. Theforward portion of the bar 391 is slidably disposed in the tubular guideternal combustion engine not operating, whereby there is no vacuum, thebar 39is positioned so that the roller 27 engages on the depressed edgeportion 117 of the cam bar 39, causing the arm 30 to be elevatedand'establishing the cut-off condition illustrated in FIGURE '11. Whenvacuum is developed, the diaphragm of the associated vacuum-responsivechamber is flexed in a direction to exert tension on the cable 110;causing the cam bar 39 to be moved to the position illustrated in FIGURE15,

namely, wherein the elevated cam portion 99" underlies the roller 27,whereby the lever 26 cannot be rotated be- .yond a positioncorresponding to that illustrated in FIG- URE 6, namely, cannot restorethe cut-off condition of FIGURE 11 until there is no more vacuum.

The cross member 113 limits the forward movement of the cam bar 39substantially to the position thereof shown in FEGURE 15, since it isengageable with the inclined front edge 118; of the elevated cam portion99'.

When the motor is not in operation, for example when its ignition isde'energized or when it stalls, vacuum is no longer available and thespring 40* expands to return the cam bar 39m aposition allowing theroller 27 to descend onto the depressed portion .117 of the top edge ofthe cam bar, producing the condition illustrated in FIGURE 11,namely,cutting off the supply of fuel to the injection device.

As illustrated in FIGURE 20, a plurality of injection devices maybecontrolled by a common vacuum responsive device 37 by employing the cambar supporting structure illustrated in FIGURES 15 and 16 with each ofthe injection devices. Thus, the diaphragm link 120 of the vacuumchamber 37 may be connected by a plurality of flexible cables 110* tothe respective cam bars 39 to-control the cut-off of fuel to therespective injection devicese and to automatically cut off the supply offuel thereto is open to the atmosphere at its top end and is adapted tobe connected at its other end to the intake manifold of an internalcombustion engine. For this purpose, the bottom end of the body 1 isprovided with a suitably apertured flange adapted tobe secured to theintake manifold of an engine in a conventional manner.

While certain specific embodiments of an improved fuel injection devicehave been disclosed in the foregoing description, it will be understoodthat various modifications within the spirit of the invention may occurto those skilled in the art. Therefore, it is intended that nolimitations be placed on the invention'except as defined by the scope ofthe appended claims.

What is claimed is:

1. A fuel injection device of the character described comprising amainfuel mixture conduitopen to atmosphere at one end and adapted to beconnected at its other end to the intake manifold of an internalcombustion en-' U conduit means, means to mount said fuel meteringconduit means rotatably in said hollow shaft means, means to connectsaid fuel metering conduit means to a source of liquid fuel, said fuelmetering conduit means and hollow shaft means being formed withcooperating sealing surface means and with registrable ports in saidsealing surface means to selectively regulate the flow of fuel from themetering conduit means to the hollow shaft means, a

throttle lever rotatably mounted on said hollow shaft means, ,athrottle'arm assembly secured to said hollow shaft means, a cam meansslidably mounted on said main conduit, said throttle lever having afirst, second and third arms, the first arm of said throttle leverbeing, connectible to an accelerator rod, spring means engaging thesecond arm of said throttle lever and biasing said fuel metering conduitmeans toward a position wherein saidports are in registry, the third armof said throttle lever being engageable with said cam means to controlthe rotated position of said fuel metering conduit means, vacuumresponsive means operatively connected to said cam means, said vacuumresponsive means being adapted to be connected to the intake manifold ofthe associated engine, said throttle lever being engageable with saidthrottle arm assembly in opposition to said spring means.

, 2. The fuel injection device according to claim 1 which includes inaddition an adjustable stop means on said main conduit opposite saidspring means and being engageable with said second arm to limit rotationof said fuel metering conduit means. p

3. A fuel injection device of the character" described comprising a mainfuel mixture conduit open to atmosphere at one end and adapted to beconnected at its other end to the intake manifold of an internalcombustion engine, hollow shaft means, means to rotatably mount s-aidhollow shaft means transversely in said main conduit, throttle levermeans operatively connected to the hollow shaft means, a butterfly valvesecured on said hollow shaft means in said mainfuel mixture conduit,said hollow shaft means and butterfly valve being formed with fuelpassage means opening into said conduit, fuel metering conduit means,means to'mount said fuel metering conduit means rotatably in said hollowshaft means, means to connect said fuel metering conduit means to asource of liquid fuel, said fuel metering conduit means and hollowshaft'means being formed with relatively rotatable cooperating sealingsurface means, one of said sealing surface means having a tapering portand the other sealing surface means having a tapering port extending ina direction substantially transverse to the firstnamed port, said portsbeing registrable in overlapping relation to define a flow-regulatingfuel transmission area varying in accordance with the relative rotatedpositions of the hollow shaft means and the fuel metering conduit means,and vacuum-responsive means connected to said fuel metering conduitmeans to maintain said fuel metering conduit means in a rotated positionwherein said ports are at least partially in registry when saidvacuum-responsive means is connected to a source of vacuum.

4. fuelinjection device of the character described comprising a mainfuel mixture conduit open to atmos phere at one end and adapted to beconnected at its other end to the intake manifold of an internalcombustion engine, hollow shaft means, means to rotatably mount saidhollow shaft means transversely in said main conduit, throttle levermeans operatively connected to the hollow shaft means, a butterfly valvesecured on said hollo w' shaft means in said main fuel mixture conduit,said hollowshaft means and butterfly valve being formed with fuelpassage means opening into said conduit, fuel metering conduit means,means to mount said fuel metering conduit means rotatably in said hollowshaft means, means to connect said fuel metering conduit means to asource of liquid fuel, said fuel metering conduit means and hollow shaftmeans being formed with relatively rotatable cooperating sealing surfacemeans, one of said sealing surface means having a tapering port and theother sealing surface meanshaving a tapering port extending in adirection substantially transverse:to the first-named port, said portsbeing registrable in overlapping relation to define a flow-regulatingfuel transmission area varying in accordance with the relative rotatedpositions of the hollow shaft means and the fuel metering conduit means,vacuum-responsive means connected to said fuel meter ing conduit meansto maintain said fuel metering conduit means in a rotated positionwherein said ports are at least partially in registry circumferentiallyspaced from said first arm, said hollow shaft means and butterfly valve.being provided .with fuel idle supply passage means communicativelyconnecting the interior of said hollow shaft means to the interior ofsaid main conduit, and externally adjustable needle valve means mountedaxiallyin said hollow shaft means and extending into said fuel idlesupply passage means. t

5. A fuel injection device of the character described comprising a mainfuel mixture conduit open to atmosphere at one end and adapted to beconnected at its other end to the intake manifold of an internalcombustion engine, hollow shaft means, means to rotatably mount saidhollow shaft means transversely in said main conduit, throttle levermeans rotatably mounted on said hollow shaft means, means resilientlyconnecting said throttle lever means to said hollow shaft means forsimultaneous rotation in one direction, means non-resiliently connectingsaid throttle lever means to said hollow shaft means for simultaneousrotation in the opposite direction, a butterfly valve secured on saidhollow shaft means in said main fuel mixture conduit, said hollow shaftmeans and butterfly valve being formed with fuel passage means openinginto said conduit, fuel metering conduit means, means to mount said fuelmetering conduit means rotatably in said hollow shaft means, means toconnect said fuel metering conduit means to a source of liquid fuel,said fuel metering conduit means and hollow shaft means being formedwith relatively rotatable cooperating sealing surface means, one of saidsealing surface means having a tapering port and the other sealingsurface means having a tapering port extending in a' directionsubstantially transverse to the first-named port, said ports beingregistrable in overlapping relation to .defi-ne a flow-regulating fueltransmission area varying in accordance with the relative rotatedpositions of the hollow shaft means and the fuel metering conduit means,and vacuum-responsive means connected to said fuel metering conduitmeans to maintain said fuel meteringconduit means in a rotated positionwherein said ports are at least partially in registry when saidvacuumresponsive means is connected to a source of vacuum.

6. A fuel injection device of the character described comprising a mainfuel mixture conduit open to atmosphere at one end and adapted to beconnected at its other end to the intake manifold of an internalcombustion engine, hollow shaft means, means to rotatably mount saidhollow shaft means transversely in said main conduit, throttle levermeans rotatably mounted on said hollow shaft means, means resilientlyconnecting said throttle lever means to said hollow shaft means forsimultaneous rotation in one direction, means to non-resiliently connectsaid throttle lever means to said hollow shaft means for simultaneousrotation in the opposite direction, a butterfly valve secured on saidhollow shaft means in said main fuel mixture conduit, said hollow shaftmeans and butterfly valve being formed with fuel passage means openinginto said conduit, fuel metering conduit means, means to mount said fuelmetering conduit means rotatably in said hollow shaft means, means toconnect said fuel metering conduit means to a source of liquid fuel,said fuel metering conduit means and hollow shaft means being formedwith relatively rotatable cooperating sealing surface means, one of saidsealing surface means having a tapering port and the other sealingsurface means having a tapering port extending in a directionsubstantially 1 1 transverse to the first-named port, said portsbeingregis trable in overlapping relation to define a flow-regulatingfuel transmission area varying in accordance with the relative rotatedpositions of the hollow shaft means and the fuel metering conduit means,vacuum-responsive means connected to said fuel metering conduit means tomaintain said fuel metering conduit means in a rotated position whereinsaid ports are at least partially in registry when saidvacuum-responsive means is connected to a source of vacuum, andadjustable stop means on the hollow shaft means engageable with saidmain conduit to limit rotation of said hollow shaft means in said onedirection.

7. A fuel injection device of the character described comprising a mainfuel mixture conduit open to atmosphere at one end and adaptedto beconnected at its other end to the intake manifold of an internalcombustion engine, hollow shaft means, means to rotatably mount saidhollow shaft means transversely in said main conduit, throttle levermeans operatively connected to the hollow shaft means, a butterfly valvesecured on said hollow shaft means in said main fuel mixture conduit,said hollow shaft means and butterfly valve being formed with fuelpassage means opening into said conduit, fuel metering conduit means,means to mount said fuel metering conduit means rotatably in said hollowshaft means, means to connect said fuel metering conduit means to asource of liquid fuel, said fuel metering conduit means and hollow shaftmeans being formed with frusto-conical relatively rotatable cooperatingsealing surface means, one of said sealing surface means having atapering port and the other sealing surface means having a tapering portextending in a direction substantially transverse to the first-namedport, said ports being registrable in overlapping relation to define aflow-regulating fuel transmission area varying in accordance with therelative rotated positions of the hollow shaft means and the fuelmetering conduit means, and vacuum-resp onsive means connected to saidfuel metering conduit means to maintain said fuel metering conduit meansin a rotated position wherein said parts are at least partially inregistry when said vacuum-responsive means is connected to a source ofvacuum. 7

8. A fuel injection device of the character described comprising a mainfuel mixture conduit open to atmosphere at one end and adapted to beconnected at its other end to the intake manifold of an internalcombustion engine, hollow shaft means, means to rotatably mount 12 saidhollow shaft means transversely in said main conduit, throttle levermeans rotatably mounted on said hollow shaft means, means resilientlyconnecting said throttle lever means to said hollow shaft means forsimultaneous rotation in one direction, means non-resiliently connectingsaid throttle lever means to said hollow shaft means for simultaneousrotation in the opposite direction, a butterfly valve secured on saidhollow shaft means in said main fuel mixture conduit, said hollow shaftmeans and butterfiy valve being forced with fuel passage means openinginto said conduit, fuel metering conduit means, means to mount said fuelmetering conduit means rotatably in said hollow shaft means, means toconnect said fuel metering conduit means to a source of liquid fuel,said fuel metering conduitmeans andvhollow shaft means being formed withfrusto-conical relatively rotatable cooperating sealing surface means,one of said sealing surface means having a tapering port and the othersealing surface means having a tapering port extending in a directionsubstantially transverse to the first-named port, said ports beingregistrable in overlapping relation to define a flowregulating fueltransmission area varying in accordance with the relative rotatedpositions of the hollow shaft means and the fuel metering conduit means,vacuumresponsive means connected to said fuel metering conduit means tomaintain said fuel metering conduit means in a rotated position whereinsaid ports are at least partially in registry, and adjustable stop meanson the hollow shaft means engageable with said main conduit to limitrotation of said hollow shaft means in said one direction.

References Cited in the fileof this patent UNITED STATES PATENTS GreatBritain a -4.

1. A FUEL INJECTION DEVICE OF THE CHARACTER DESCRIBED COMPRISING A MAINFUEL MIXTUE CONDUIT OPEN TO ATMOSPHERE AT ONE END AND ADAPTED TO BECONNECTED AT ITS OTHER END TO THE INTAKE MANIFOLD OF AN INTERNALCOMBUSTION ENGINE, HOLLOW SHAFT MEANS, MEANS TO ROTATABLY MOUNT SAIDHOLLOW SHAFT MEANS TRASVERSELY IN SAID MAIN CONDUIT, A BUTTERFLY VALVEMEANS SECURED ON SAID HOLLOW SHAFT MEANS IN SAID MAIN FUEL MIXTURECONDUIT, SAID HOLLOW SHAFT MEANS AND BUTTERFLY VALVE MEANS BEING FORMEDWITH FUEL PASSAGE MEANS OPENING INTO SAID CONDUIT, FUEL METERING CONDUITMEANS, MEANS TO MOUNT SAID FUEL METERING CONDUIT MEANS ROTATABLY IN SAIDHOLLOW SHAFT MEANS, MEANS TO CONNECT SAID FUEL METERING CONDUIT MEANS TOA SOURCE OF LIQUID FUEL, SAID FUEL METERING CONDUIT MEANS AND HOLLOWSHAFT MEANS BEIANG FORMED WITH COOPERATING SEALING SURFACE MEANS ANDWITH REGISTRABLE PORTS IN SAID SEALING SURFACE MEANS TO SELECTIVELYREGULATE THE FLOW OF FUEL FROM THE METERING CONDUIT MEANS TO THE HOLLOWSHAFT MEANS, A THROTTLE LEVER ROTATABLY MOUNTED ON SAID HOLLOW SHAFTMEANS, A THROTTLE ARM ASSEMBLY SECURED TO SAID HOLLOW SHAFT MEANS, A CAMMEANS SLIDABLY MUNTED ON SAID MAIN CONDUIT, SAID THROTTLE LEVER HAVING AFIRST, SECOND AND THIRD ARMS, THE FIRST ARM OF SAID THROTTLE LEVER BEINGCONNECTIBLE TO AN ACCELERATOR ROD, SPRING MEANS ENGAGING THE SECOND ARMOF SAID THROTTLE LEVER AND BIASING SAID FUEL METERING CONDUIT MEANSTOWARD A POSITION WHEREIN SAID PORTS ARE IN REGISTRY, THE THIRD ARM OFSAID THROTTLE LEVER BEING ENGAGEABLE WITH SAID CAM MEANS TO CONTROL THEROTATED POSITION OF SAID FUEL METERING CONDUIT MEANS, VACUUM RESPONSIVEMEANS OPERATIVELY CONNECTED TO SAID CAM MEANS, SAID VACUUM RESPONSIVEMEANS BEING ADAPTED TO BE CONNECTED TO THE INTAKE MANIFOLD OF THEASSOCIATED ENGINE, SAID THROTTLE LEVER BEING ENGAGEABLE WITH SAIDTHROTTLE ARM ASSEMBLY IN OPPOSITION TO SAID SPRING MEANS.